Ineed on this math problem
5 pts

These triangles are congruent, it means all sides are equal.

We equate the sides that are equal and we get this two equations:

x = y + 1 (1)
x + 3 = 3y (2)

Sub (1) into (2)
(y + 1) + 3 = 3y
y + 1 + 3 = 3y
3y - y = 3 + 1 
2y = 4
y = 2 sub back into (1)

x = y + 1
x = 2 + 1
x = 3

Ans: x = 3, y = 2

She isn't correct. 43 is a 2-digit odd number but it isn't composite. It's a prime number.